2 #ifndef _ASM_PCI_BRIDGE_H
3 #define _ASM_PCI_BRIDGE_H
5 #include <linux/config.h>
7 #include <linux/list.h>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
17 * Structure of a PCI controller (host bridge)
19 struct pci_controller {
23 struct list_head list_node;
28 void __iomem *io_base_virt;
29 unsigned long io_base_phys;
31 /* Some machines have a non 1:1 mapping of
32 * the PCI memory space in the CPU bus space
34 unsigned long pci_mem_offset;
35 unsigned long pci_io_size;
38 volatile unsigned int __iomem *cfg_addr;
39 volatile void __iomem *cfg_data;
41 /* Currently, we limit ourselves to 1 IO range and 3 mem
42 * ranges since the common pci_bus structure can't handle more
44 struct resource io_resource;
45 struct resource mem_resources[3];
49 unsigned long dma_window_base_cur;
50 unsigned long dma_window_size;
54 * PCI stuff, for nodes representing PCI devices, pointed to
55 * by device_node->data.
57 struct pci_controller;
61 int busno; /* for pci devices */
62 int bussubno; /* for pci devices */
63 int devfn; /* for pci devices */
65 #ifdef CONFIG_PPC_PSERIES
66 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
68 int eeh_check_count; /* # times driver ignored error */
69 int eeh_freeze_count; /* # times this device froze up. */
70 int eeh_is_bridge; /* device is pci-to-pci bridge */
72 int pci_ext_config_space; /* for pci devices */
73 struct pci_controller *phb; /* for pci devices */
74 struct iommu_table *iommu_table; /* for phb's or bridges */
75 struct pci_dev *pcidev; /* back-pointer to the pci device */
76 struct device_node *node; /* back-pointer to the device_node */
77 #ifdef CONFIG_PPC_ISERIES
78 struct list_head Device_List;
79 int Irq; /* Assigned IRQ */
80 int Flags; /* Possible flags(disable/bist)*/
81 u8 LogicalSlot; /* Hv Slot Index for Tces */
83 u32 config_space[16]; /* saved PCI config space */
86 /* Get the pointer to a device_node's pci_dn */
87 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
89 struct device_node *fetch_dev_dn(struct pci_dev *dev);
91 /* Get a device_node from a pci_dev. This code must be fast except
92 * in the case where the sysdata is incorrect and needs to be fixed
93 * up (this will only happen once).
94 * In this case the sysdata will have been inherited from a PCI host
95 * bridge or a PCI-PCI bridge further up the tree, so it will point
96 * to a valid struct pci_dn, just not the one we want.
98 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
100 struct device_node *dn = dev->sysdata;
101 struct pci_dn *pdn = dn->data;
103 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
104 return dn; /* fast path. sysdata is good */
105 return fetch_dev_dn(dev);
108 static inline int pci_device_from_OF_node(struct device_node *np,
113 *bus = PCI_DN(np)->busno;
114 *devfn = PCI_DN(np)->devfn;
118 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
121 return pci_device_to_OF_node(bus->self);
123 return bus->sysdata; /* Must be root bus (PHB) */
126 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
127 struct device_node *dev, int primary);
129 extern int pcibios_remove_root_bus(struct pci_controller *phb);
131 extern void phbs_remap_io(void);
133 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
135 struct device_node *busdn = bus->sysdata;
137 BUG_ON(busdn == NULL);
138 return PCI_DN(busdn)->phb;
141 extern struct pci_controller *
142 pcibios_alloc_controller(struct device_node *dev);
143 extern void pcibios_free_controller(struct pci_controller *phb);
145 /* Return values for ppc_md.pci_probe_mode function */
146 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
147 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
148 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
151 #endif /* __KERNEL__ */